package cn.lmxdev.ptms.component;

import jakarta.servlet.http.HttpServletRequest;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Component;

import java.net.InetAddress;

@Slf4j
@Component
public class IpComponent {
    public String getIpAddress(HttpServletRequest request) {
        String ipAddress = null;
        try {
            ipAddress = request.getHeader("x-forwarded-for");
            if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress))
                ipAddress = request.getHeader("Proxy-Client-IP");
            if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress))
                ipAddress = request.getHeader("WL-Proxy-Client-IP");
            if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
                ipAddress = request.getRemoteAddr();
                if (ipAddress.equals("127.0.0.1")) {
                    // 根据网卡取本机配置的IP
                    ipAddress = InetAddress.getLocalHost().getHostAddress();
                }
            }
            // 对于通过多个代理的情况，第一个IP为客户端真实IP,多个IP按照','分割
            if (ipAddress != null && ipAddress.length() > 15)
                if (ipAddress.indexOf(",") > 0)
                    ipAddress = ipAddress.substring(0, ipAddress.indexOf(","));
        } catch (Exception e) {
            ipAddress = "";
        }
        return ipAddress;
    }
}
